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Finding the Fourth Proportional to 1,053.79, 1,580.75 and 591.21

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Solution

The fourth proportional to 1,053.79, 1,580.75 and 591.21 is: 886.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053.79 : 1,580.75 = 591.21 : x
  2. Step 2: Convert to fraction form
    1,053.79/1,580.75 = 591.21/x
  3. Step 3: Cross multiply
    1,053.79x = 1,580.75 × 591.21
  4. Step 4: Simplify right side
    1,053.79x = 934,555.21
  5. Step 5: Solve for x
    x = 934,555.21/1,053.79
  6. Step 6: Final answer
    x = 886.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.